BENDIX TCH-002-012 User Manual

Technical Bulletin

Bulletin No: TCH-002-012 Effective Date: 4/21/2011 Cancels: TCH-002-012 dated 9/12/2008 Page: 1 of 1

Subject: Air Disc Brake Chambers for Trailer Applications

Bendix Spicer Foundation Brake LLC now offers a Bendix® double diaphragm air disc brake spring brake
chamber for trailer applications. The service brake performance and operating characteristics of the Bendix
piston style spring brake and the Bendix® double diaphragm style air disc brake spring brakes are identical,
providing a perfect match for your Bendix® ADB22X™ air disc brake when replaced in service.

Replacing a Bendix® piston style spring brake chamber with a Bendix® double diaphragm style spring brake
chamber will maintain your Bendix warranty and provide the proper brake balance when installed on one or
more wheel ends in trailer applications. The subtle differences in the parking spring forces show no degradation
of brake emergency or parking effectiveness on trailers. Currently double diaphragm style spring brake
chambers are not released as service replacements for truck/tractor air disc brake applications where spring
brake modulation can occur.

Below is a listing of the most common trailer air disc brake spring brake chamber confi gurations including both
piston and double diaphragm style spring brake chamber replacement part numbers. Universal replacements
may require port and/or clamp band clocking for specifi c applications. Please refer to the instruction sheet
packaged with the spring brake chamber for clocking instructions.

Bendix® Piston Style Air Disc Brake Chamber Bendix® Double Diaphragm Air Disc Brake Chamber

®

Bendix

®

18/24 Spring Brake Chambers

Piston Style Double Diaphragm

OE

Number

5018436 802756

5018437 802757 K026129 K026338

5018434 802754 K026127 K026336

5018435 802755 K026128 K026337

Service

Number

Universal

Replacement

Number

K025670

OE Number

5020489 803154

Bendix® 20/24 Spring Brake Chambers

Piston Style T20/5.6 Double Diaphragm

OE

Number

5016289 802342

5016290 802343 K039228 K041953

5016285 802338 K039223 K041948

5016286 802339 K039224 K041949

Service

Number

Universal

Replacement

Number

K025669

OE Number

K039227 K041952

Service

Number

Direct

Replacement

Universal

Replacement

Number

K026451

Universal

Replacement

Number

K041960

© 2011 Bendix Commercial Vehicle Systems LLC 4/2011. All rights reserved. Printed in U.S.A.